Furnace-casing ring.



S. C. SHIPMAN.

FURNACE CASING RING.

APPLlcATloN FILED MAY14.1915.

Patented Mar. 26, 1918.

' Application med May 14, 1915. serial No. 255,174.

, To all 'whom t may concern.' l

' shall be adapted to form a secure joint or coupling between alined casing sections, and to provide a joint which may be simply and easily formed entirely of sheet metal and which will be durable in operation.

More specically it is an object of this invention to provide a casing ring consisting of an annular strip of sheet metal, the upper and lower ends of which may be doubled upon the body of the strip and subsequently flanged outwardly therefrom in spaced relation and oppositely to contact with the edges to be coupled of a pair of alined casing sections.,V Y Y The above andadditional objects which will become apparent as this explanatory description proceeds, are accomplished by such means as are illustrated in the accompanying drawings, described in the following specification and then more particularly ointed out in the claim which is appended hereto and forms a part of this specification.

With referenceto the drawings, wherein there is illustrated the preferred embodiment of this invention, as it is reduced to practice, and Vthroughout the several views of which like characters ofV reference designate similar parts: t

Figure 1 is an elevational view ofthe casing ring of this invention as employed to couple a pair of furnace sections Fig. 2 is a sectional view through the structure shown in Fig. 1; and

Fig. 3 is an enlarged detailed perspective view showing the two ends of the ring 1n their engaging position. Y

VThe casing ring of this invention is adapted to be formed from a single strip of sheet metal, the median portion of which is designated 5 and the upper and lowerportions of which are folded back upon the body- 'portion in the manner indicated by the respective numerals 6 and 7 The edge portion of each of these folded portions isagain bent and reversely to the folded portions to pro- Speoicatoniof Letters Patent.

amar ernten. seiuunno. srrIPMAiv', or roux, NEBRASKA. Y Y

rUnnAon-oasme RING.

ratentea nar. se, raie.

vide flanges 8A which are spaced from the respective folded portions 6 and 7 a distance sufficient to permit of the entrance of the adjacent ends of furnace casing sections.

lhe portions 6 and 7 of the sheetmetal strip are not struck up to form thespaced j flanges 8 at the extreme ends of said strip but instead' they are overlapped as indicated at 10. Through oneend 12 an elongateduaperture or slot 11 is formed extending crosswise of `the ring and preferably at the center thereof. The Opposite end 13 of the ringstrip has ya tongue cut fromone and preferably both of the portions 6 and 7,-which, as indicated at 14 and 15, project through the slot 11 and are turned upwardly and downwardly against the outer face of the 12, thereby securingl the two overlapping ends of the ring strips together. This construction, it is thought, will be suf ficiently secure to maintain the ends of the ring strip connected.

In use, when it is desired to aline a pair of furnace casing sections 9, the coupling ring Vconstructed in accordance with this invention is adjusted first upon the lowermost furnace casing section in such manner that the edge of such section is embraced between the folded portion 7 and the reverse iange 8 in the manner best illustrated in Fig. 2, while the opposite edge of the ring engages in a similar manner with the lower edge of the uppermost furnace casing section. .By this means a secure and leak- .tight joint is provided between the casing sections, while at the same time the interior of the joint `presents thestraight surface of the median portion 5. lt is moreover, apparent that a tight joint is provided between the sections which at the same time is readily removable. The pressure of the upper section 9 on its flange 8 will serve only to tighten the engagement therewith and will similarly serve to tighten the engagement of the lower flange 8 with its sections. While the median portion 5 of the sheet metal plate forming the basis of this invention is shown to be of sufficient width to space the sections, it is to be understood that the width shown is not an essential of this invention and that the bent edges of the opposite flanges 8 may be very readily adapted to contact with each other, as would be permitted by commensurate shortening of the body portion 5. VJhile this invention has been particularly directed to the provision of a casing ring adapted to join alined sections of a furnace, it will be readily observed that rings similarly .constructed as provided hereby may be used 'for `coupling` pipe sections of every character.

While in the foregoing however, there has thus been illustrated in the dra-wings and described in the specification such combination and arrangement of elements as constitutethe preferred embodiment of this in- Vyention, it is desired to emphasize the fact that such minor ychanges in the matters of proportion and Adegree rvmay "be 'm'ade "in later adaptations "of this `device as shall not alter the spirit of 4the invention asden'ed in the appended claim.

A casing` ring composed ofa single length of -sheet metal'folded intocontactnpon itself sothat at its 1ends, the folds-overlap the portion intermediate theoverlap `portions at the copiosa: 'this paren-t may betontained for 'five cents each, ytiraaafessniglelie1eliminierenel':nf :este

ends being slit inwardly from the lree edges andthe metal lying Aloetween said slits being recurv'ed to lie spaced from the folded over "portion,` to receive the flanges of furnace casing` sections, a transverse slot formed in the-ring -adjacentone end, while `the other end of the ring has spaced tongues formed thereon in"lo'ngitludinal alinement, Vone end of said ring being adapted to overlap the other end, the `tongues :being "adapted toent`e`r and "coperatie with the slot and to de tachablyretain the endsot the ring against movement;

In testimony -whereof Il aiiX my signature 

